At the moment, Scott Tolzien, a two-year veteran with zero career pass attempts, is the only other quarterback on the roster. The options in free agency (not particularly appetizing on March 12) are dwindling after logical 49ers targets Matt Hasselbeck and Josh Johnson signed with Indianapolis and Cincinnati, respectively, this week.

The 49ers will surely address the position in the draft, but they wouldn’t enter the season with two backups who lack NFL game experience.

Right?

Actually, wrong.

Two years ago, the 49ers did just that. In 2011, the quarterback depth chart read as follows:

1. Alex Smith.

2. Kaepernick (then a rookie who had a 23.9 rating in the preseason. In other words, he wasn’t yet Colin Kaepernick).

3. Tolzien (an undrafted rookie who was waived by Chargers and signed seven days before San Francisco’s season opener).

Oh, sure, the 49ers brought in a veteran quarterback that summer: They signed Josh McCown, then 32, during the preseason, but waived him during final roster cuts.

A few days later, Harbaugh was asked why he cut McCown and was starting the season with two greenhorns behind Smith. This, after a lockout had wiped out most of the rookies’ offseason.

“In an effort to get to our best 53 on the roster,” Harbaugh said, “it was the decision that we made.”

Of course, Harbaugh loved Kaepernick (his dad, Jack, said before the Super Bowl that his son viewed him as the best player in the 2011 draft). And he obviously felt comfortable starting him in the event Smith had been injured, regardless of Kaepernick’s preseason struggles (0 TDs, 5 INTs).

Two years later, it’s possible Harbaugh — who, you might have heard, has a decent eye for quarterback talent — believes Tolzien can be a capable NFL backup. Or maybe he’s fallen for a draft prospect who will battle Tolzien for the spot this summer.

Would the 49ers, on the cusp of a Super Bowl, really enter the season with Kaepernick and two quarterbacks who have never thrown a pass in a regular-season game?